So, yesterday I was riding my bike with a friend to go have lunch. Someone texted me and I (stupidly) reached into my purse to try and get my phone out. Somehow I fell off and my bike flipped over my head and almost landed on top of me. Luckily, I landed in grass so I'm not badly hurt. I kind of landed on my stomach and my arms and hands. My thumb has hurt since then. When any pressure is applied to the back, anywhere from the tip of it to the knuckle in the middle of my thumb, and on the front (palm side) in the same area. When I have pressure on both sides on the tip it doesn't hurt but it does if it's just on one side. Some of my friends and my mom have speculated that it's a bruised bone, but I don't really know anything about injuries. What do you think I did to it, about how long will it take to heal, and should I go see a doctor about it?